Kramerite

Roman Kanich·July 17, 2022·0 comments

Kramerite
Clades: Borates.
Chemical: NaCaB5O7(OH)4·3H2O.
Colour: colourless; colourless in transmitted light.
Lustre: vitreous.
Hardness:3½.
Specific Gravity: 2.14.
Crystal System: Monoclinic.